Transfer mechanism for calculating-machines.



H. W. CLEMENT. TRANSFER MECHANISM FOR CALCULATING MACHINES.

APPLICATION PILBDJAH. 16, 1913. 1,073, 2 Patented N0v.18, 1913.

"INT. OFFISE' HENRY W. CLEMENT, OE RIlTLAND, VERMONT.

TRANSFER MECHANISM FOR OALGULATING-MACHINES.

Specification of Letters Patent. Patented E93]: 18, 1913,

Application filed January .16, 1813. Serial No. 742,846.

To all whom it mag concern *Be itknown that I, HENRY W. CLnMnNT, a citizen of the United States. residing at Rutland,' county of Butland and State of Vermont, have invented a new and Im proved Transfer Mechanism for Calculating-Machines, of which the following. is a specification. v

This invention relates to a novel mechanism' for transmitting the tens, hundreds,

etc, in calculating machines. This transmission is generally eifected by temporarily bringing a transfer finger into engagement with a toothed wheel which is advanced for one tooth during each rotation of said finger.

The resent invention comprises novel means or so actuating said finger that it requires for its operation but a minimum expenditure of power and that an accidental displacement of the finger-carrying sleeve from the position to which it has been set, is effectively prevented.

In the accompanying drawings: Figure 1 is a cross section through part of a calculat-ing machine, embodying my invention; Fig. 2 a plan of part of Fig. 1; Fig. 3 a cross section on line 3-3, Fig. 2, and Fig. d a

similar section through a modified form of the retainin member.

For each igitdial 10, there is provided in the machine frame 11, a squared shaft 12 carrying a toothed sector 13 having a mum ber of teeth 14 that gradually decrease in length. Shaft 12 is rotated through spindle 15 and miter wheels 16, while it in turn transmits its movement to a pinion 17 shown to be slidable on a squared shaft 18. Upon the latter is reciprocably mounted a sleeve 19 carrying a pair of beveled gear wheels 20, either one of which is adapted to engage a similar wheel 21. The latter is keyed to the spindle 22 of the registering dial 10 that displays its numbers through a window 23 handle 27 of a carriage 24. Intermediate wheels 20 is arranged a shipping bar 26 operated from through a lever and link connection 28. whereby the machine may be set either for addition and multiplication or for subtraction and division. Shaft 18 carries a relatively fixed toothed wheel 29and a.

scalloped disk 30' which is adapted to be engaged by the solid section of a mutilated barrel 31 slidably and non-rotatably mount ed upon shaft 12, and serving for the purpose of lockin dial 23 against accidental notation. Too ed wheel 29 is, adapted to be IJO formed in the hub or sleeve 39 of barrel 31, said hub also carrying the finger herein-' above referred to. Whenever tappet 33 engages trigger 3d, the latter is so tilted by lever to move shipping bar 36 to the right (Figs. 1 and 2) which movement. is transmitted to hub 39 and barrel 31 by arm 37. In this way, finger 32 is brought into alinement with toothed wheel 29, so that upon the rotationof the finger, said wheel will be advanced for one tooth. F or subsequently returning the hub and barrel to their original position, the former is provided with a helical cam 40 adapted to engage a fixed abutment 41.

In order to facilitate the reading of the several dials, etc, it is preferred to mount the mechanism described on a slant as illustrated in Fig. 1. The vibintions and severe shocks imparted to the machine during the normal operation thereof will therefore have the tendency to cause barrel 31 after being shifted upward to the right 1) to ree turn by gravity to its original position, so that finger will be brought out of alin.

ment with Wheel 29 before having actuated the latter. in order to prevent such an objectionable dislodgment ofthe parts. hub 39 of barrel 31 is provided with a groove 12 extending partly around said hub and having tapering sides 13. This groove is adapted to be engaged by a retaining member shown to be made in the form a roller l4 having tapering sides. This rol-i is jour-ualed in a plunger rocably mounted in a fixed bracket so, a spring 47 tending to force the roller into groove 4.2. v I

The mutual arrangement ofthe parts is such that when finger 32 has been shifted into its operative position, roller 4L4 engages groove 42 and thus prevent-s an accidental axial displacement of hub 39, finger and barrel 31, until the finger had been in operative engagement with toothed wheel 39 and had thus performed its work. Groove 42 messes gradually merges into the circumference of hub 39 as at 4:8 after engagement between t 1e parts 8:2, 29 has taken place, so that roller 44 will be. gradually lifted out of the groove and will engage the cylindrical surface of hub 39, so that cam l0 is free to shift the hub together with the parts carried thereby, back to their original position. l enever tappet 33 causes a movement of hub 39 to the right (Fig. 1) its grooved section is again axially alined with roller 44, so that the spring l? will assist the trigger in its work and thus reduce the power necessary for the peration of the machine. This is due to the fact that as soon as roller 44 enters groove 42 the spring-influenced engagement of the slanting groove and roller faces will effect a shifting of the hub toward the right.

lnil ig. 4i, roller 44 is dispensed with, and the plunger l5 is provided with a coniform end l the bevel of which corresponds sub stantially to that of the groove sides.

It will be seen that by the construction described, all retaining springs hitherto generally employed for holding hub 39 in either of its end positions are dispensed with, so

' that the work to be perforn'ied by tappet 33 jerks are avoided.

is greatly reduced, while the only spring 811% ployed assists the tappet in its operation. 'lhc subsequent gradual compression of the spring is performed while the tappet is inoperative, so that a great nni'hn'mity of movement is obtained and objectionable I claim:

1. In a device of the character described, a rotatable shaft, a hub slidable thereon and carryi 1g a transfer finger, said hub being provided vith a cylindrical section and with a circum erential groove that gradually merges into said cylindrical section, a spring-inliuenced retaining member that normally engages the cylindrical hub section, and m ans for shifting; the hub on the shaft to bring said member into engagement with the hub-groove.

in a device of the character described, a spring-iniiuenced retaining member, an

inclinedrotatable shaft, a hub slidablc there i on and carrying transfer linger, said hub being provlded with a cylindrical section and with a circumferential groove that gradually merges into said cylindrical section, means for shifting the hub on the shaft to its lowermost position, the Wei gliit of the hub causing the latt r to retain such lowermost position whereby the cylindrical hub section is maintained in engagement with the retaining member, and means for raising the hub on the shaft against its weight to bring the grooved hub-section into engagement with the retaining member.

3. In a device of the character described, a spring-influenced retaining member having a chamfered end, an inclined rotatable shaft, a hub slidable thereon and carrying a transfer finger, said hub being provided with a cylindrical section and with a circumferential groove having an inclined. side wall and gradually merging into said cylindrical section, means for shifting the hub on the shaft to its lowern'iost position, the weight of the hub causing the latter to re tain such lowermost position whereby th cylindrical hub section is maintained in en gagement with the retaining member, and means for raising the hub on the shaft against its weight to bring the grooved huh section into engagement with the retaining member, the engagement between the cham fercd end of said member and the inel "l grooveavall assisting the raising means the movement of the hub.

l. in a device of the character described, a spring-influenced retaining member having a chamfered end, an inclined rotatable shaft, a hub slidable the con and carrying a transfer linger, said hub being provided with a cylindri :al section and with a circui'nferential groove having an inclii'icd side wall and gradually merging into said cylindrical section, a cam surface on the hub, a stationary pin adapted to be engaged bv said surface to shift the hub on the shale to its lowermost position, the weight of the hub causii the latter to retain such lower inosl posi on \\lltl.\l) the cylindrical hub section mainlaincdinenyw went with. the retaining member, n'i'eans fo. aising the l uh on the shaft against its weight to the,

grooved hub section into engagement with the retaining member, the ei'igagement between the chamfered end of said member and the inclined groove-wall assisting the raising nouns in the nnnement of ti x "i. H s n... ,1. buiin, 

